potential business benefits of oblique cameras ... - eurosdr

Potential business benefits of oblique cameras for an NMCA

R E M O T E S E N S I N G S E R V I C E S

EuroSDR WorkshopOblique Aerial Cameras

Sensors and data processing

Paul MarshallOrdnance Survey GB

Monday 9th October 2017

Aims of the talk

The use of Remote Sensing at Ordnance Survey

Current Oblique Camera Technology investigations

Future Business requirements

Potential Business Benefits to an NMCA

© Ordnance Survey 2017


Who we are

• National Mapping Agency of Great Britain.

• 250,000 km sq.

• Providing accurate and up-to-date geographic data, relied on by government, business and individuals.

• Some key producs

• OS MasterMap® • Topography Products

• Green Space

• Highways

• Water Networks

• Imagery

• Integrated Transport Network

• Height Products

• OS Terrain 5 (DTM)

• Building Height Attributes


© Ordnance Survey 2017 |

Topography

Imagery Layer

OS Terrain 5 (DTM)

BuildingHeight Attributes

Green Space

Highways

Water Networks

Integrated TransportNetwork

Products updated using Remote Sensing


© Ordnance Survey 2017 |

OS Flying UnitBased at East Midlands2 x Cessna 404Vexcel Imaging UltraCam XP’sNadir cameras

Typical flight diagram(15cm GSD80/30% overlap)

Urban geospatial database mapping


Current Oblique Camera Technology Investigations


2015 investigations


Leica RCD30 Penta Oblique camera trial – 2015

3D Building Modelling visualization

Classified Point Cloud

Digital Surface Models (DSM’s)

Building Classification

Building Modellinge.g. Leica 3D Modeller


2015 investigations - findings

2017

Future Business Requirements



EuroSDR E-Learning


Update for 2017

3D Building Modelling

Smart Cities mappinguser case; –Geospatial requirement for 5G Telecommunications Planning


3D Building Visualisation & City Model texturingConsumer v GIS customers

Oblique Ortho-imagery

© Ordnance Survey 2017 | Confidential

© Ordnance Survey 2017 l

Smart CitiesUser Case; Geospatial data for 5G Telecom Planning

© Ordnance Survey 2017 l

Smart Cities


High definition geospatial data for 5G Telecommunication planning.

• Field Survey

• Mobile Mapping

• UAV

• Airborne Oblique camera systems

• Airborne Vertical camera systems

Field surveying



UAVUnmanned Aerial Vehicle


Mobile Mapping


Vertical aerial imagery


Fused Mobile Mapping & Vertical imagery


Leica Penta Oblique


Mobile mapping

Oblique imagery


Feature Extraction

Using either:-

a) Dense 3D Point Cloud

b) Oblique and Nadir Stereo imagery

Point cloud & imagery courtesy of IGI-Systems

Potential Business Benefits to an NMCA

Investigations show a good business potential when using Oblique data for Feature Extraction for high-definition mapping.

Potential to measure building facades (using stereo imagery)

Automation of 3D City Modelling (3D Textured TIN models or 3D MESH) – helps towards creating the ‘Digital Twin’; Digital Built Britain, BIM/3D GI initiative.

Probably needs more than one use for full business realisation.


Conclusion

Oblique has advantages in:-

• Total coverage of City areas with minimal occlusions

• Multiple views of each feature

• See under features

• 3D Colourised 3D City Model automatically created

• Efficiency of data capture and processing

• Stereo Oblique capability

• Etc.

GSD very important (needs to be under 8cm in Nadir imagery for HD Mapping Feature Extraction)

Flying heights – an issue over dense urban areas

% overlap important, to avoid occlusions whilst being efficiently flown


Paul MarshallLead ConsultantRemote Sensing ServicesOrdnance Survey (GB) [email protected]

potential business benefits of oblique cameras ... - eurosdr

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